Time outdoors was related to PCNA expression [F(1, 50.6) = 6.75, p = 0.012, B = 0.0004, SEM = 0.002] and an interaction [F(1, 44.7) = 6.64, p = 0.013] indicated that this association was again attributable to a positive relationship in the rostral HF [F(1, 46.0) = 7.36, p = 0.009, B = 0.0092, SEM = 0.003], with no correlation in the caudal subregion [F(1, 39.0) = 0.02, p = 0.895, B = −0.0002, SEM = 0.002]. Here, PCNA is linked to hydrops fetalis.